20041171605 has 128 divisors (see below), whose sum is σ = 44097930240. Its totient is φ = 8409277440.

The previous prime is 20041171547. The next prime is 20041171651. The reversal of 20041171605 is 50617114002.

It is a happy number.

20041171605 is a `hidden beast` number, since 2 + 0 + 0 + 41 + 17 + 1 + 605 = 666.

It is not a de Polignac number, because 20041171605 - 2¹⁰ = 20041170581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2219079 + ... + 2228091.

It is an arithmetic number, because the mean of its divisors is an integer number (344515080).

Almost surely, 2^20041171605 is an apocalyptic number.

It is an amenable number.

20041171605 is an abundant number, since it is smaller than the sum of its proper divisors (24056758635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20041171605 is a wasteful number, since it uses less digits than its factorization.

20041171605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9228 (or 9222 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

Adding to 20041171605 its reverse (50617114002), we get a palindrome (70658285607).

The spelling of 20041171605 in words is "twenty billion, forty-one million, one hundred seventy-one thousand, six hundred five".